Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd7dd21ca3584145…

MALICIOUS

PDF

94.6 KB Created: 2021-03-10 02:06:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ccb2eafd1ce42ced21166677a1e6dfdc SHA-1: b1de9414f8bce54ab48e5cfea675a50ff2db013f SHA-256: fd7dd21ca3584145015c031441f24d6d3440042af46d3e526ee00c95c2210416
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, including ClamAV's Pdf.Phishing.Trojan detection. It functions as a link farm, hosting numerous external links on disposable domains, likely to obscure the ultimate malicious destination. The document body, though heavily obfuscated, suggests a lure related to guides or resources, aligning with phishing or scam tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://nipisod.ru/award?keyword=10th+new+guide+2020+to+2020+pdf PDF link annotation
    • https://kewejalafu.weebly.com/uploads/1/3/5/3/135329801/e30c7f657.pdfIn PDF document text
    • https://kaxawoxo.weebly.com/uploads/1/3/1/0/131070710/fatenojaxiz_fepadexerus_vaviwiganuda_vovafu.pdfIn PDF document text
    • https://cdn.sqhk.co/nogegamapagi/jjv8viV/31627175844.pdfIn PDF document text
    • https://cdn.sqhk.co/jidulopavoji/idhaF29/bomb_squad_modding.pdfIn PDF document text
    • https://guwosifewutus.weebly.com/uploads/1/3/4/6/134616196/mifusevufek_lixin_ruzexurubux.pdfIn PDF document text
    • https://siwukomeje.weebly.com/uploads/1/3/1/3/131383380/fosati-jomomafet.pdfIn PDF document text
    • https://cdn.sqhk.co/zejizoguzut/exgjieK/police_chase_near_me_today.pdfIn PDF document text
    • https://forugizatufuru.weebly.com/uploads/1/3/1/4/131410167/2307972.pdfIn PDF document text
    • https://cdn.sqhk.co/pugepavofu/1gdoieC/47314676108.pdfIn PDF document text
    • https://nosisakapu.weebly.com/uploads/1/3/4/7/134773138/lesujatulapo-labugofurixoga.pdfIn PDF document text
    • https://xewixubigikuj.weebly.com/uploads/1/3/4/8/134892453/8300991.pdfIn PDF document text
    • https://nuxirudeduw.weebly.com/uploads/1/3/4/4/134442083/ponimop_gikuxumisifoz_samidegatog_rapubasunobotu.pdfIn PDF document text
    • http://rivozuzeno.mywebcommunity.org/zakuwiwutor.pdfIn PDF document text
    • https://lefazevi.weebly.com/uploads/1/3/0/8/130873710/125115.pdfIn PDF document text
    • https://xoxopazivufa.weebly.com/uploads/1/3/5/3/135398299/9664e9d7d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/destiny_2_guided_raid_ticket.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/appendicitis_guidelines_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/tigesavololisotezewe.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/free_sample_bartending_resume_template.pdfIn PDF document text
    • http://nununad.myartsonline.com/officejet_pro_8600_ink_cartridge_replacement.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001104e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1104E 6744 bytes
SHA-256: b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
font_01_sfnt_off00012133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12133 5112 bytes
SHA-256: 756e8c7a0ea42988bf1256002990ee6db183d977879018e7760eea86d465e837
font_02_sfnt_off000132bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132BC 5552 bytes
SHA-256: ff2a8d1e338343d5234ba6b2aafacb2c14814e48d4cd1d98dbc813de2ce6002f
font_03_sfnt_off00014560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14560 10876 bytes
SHA-256: 7d10638e49ca9cb4d0a137203bab793cc4adadf086fbdfb01e95a9cb1889ccde

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